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    # microcutting
    
    
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    Comparison of micro-waterjet, laser, EDM, NC, ... cutting
    
    
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    ## micro-waterjet
    ### MicroMAX at OMAX Demo Lab - https://www.omax.com/omax-waterjet/micromax
    
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    Nozzle: 7/15 MAXJET5 Minijet Nozzle with 0.007" ID diamond orifice and 0.015" Roctec 500 mixing tube
    
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    Abrasive: 240 mesh Barton HPX garnet with a mean particle size of 60 um at a flow rate of 0.12 lb/min
    
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    Pressure: 50 ~ 55 ksi
    
    Cutting time: 3.1 min
    
    
    
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    ## solid-state laser micromachining
    
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    <!-- (picture of machine, cost of machine, machining time, picture before and after post-processing) -->
    
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    ## ultrafast laser micromachining
    
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    ## EDM
    
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    ### Full-scale Toolpathing
    
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    We toolpathed the microspline part at the full ~2" long scale. This would be cut from a stack of six sheets of 0.03125" thick brass layered on top of a 1/16" thick piece of steel. We added slits in the frame to avoid pre-drilling any holes. We also removed all of the tabs. This may prove to be a bad idea but it allows us to get a sense of the speed of Wire-EDM vs uAWG without having to do a lot of pre-processing. The total path length of the full scale toolpath is 52.5 inches. With an expected cut speed of at most 0.22 inches/minute, the expected cut time is approximately 4 hours.  
    
    
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    ### 1/3-scale Testing
    
    Given the long machining time, we ultimately decided to do a 1/3-scale test cut from a stack of 0.01" brass sandwiched between 0.25" aluminum. The perimeter of this toolpath measures 17.5 inches. With an expected cut speed of 0.18 inches/minute, the expected cut time is just about 100 minutes or 1 hr 40 mins.
    
    
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    ## [Micromachining using Zund G-3 L-2500](Zund/README.md)
    
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    ## [Fablight fiber laser](http://cba.mit.edu/tools/display/?type=tool&id=fablight_3000_laser_cutter)
    
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    Machining time: ~5 min
    
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    Cost of machine: sheet only machine with the 3000 laser is around $80,000, and the tube & sheet is around $90,000
    
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    Machine settings:
    
    ![Fablight settings](../images/Fablight_settings.jpg)
    
    Sample photos:
    
    
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    ![fablight 1](../images/Fablight_01.jpg)
    
    ![fablight 3](../images/Fablight_03.JPG)
    
    ![fablight 5](../images/Fablight_05.JPG)
    
    
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    After burr removal 
    
    
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    ![fablight 6](../images/Fablight_06.jpg)
    
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    The brown seen on the edges of the piece are burn marks where the machine cut. 
    
    
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    ![fablight 7](../images/Fablight_7.JPG)
    
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    ![fablight 8](../images/Fablight_08.JPG)
    
    
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    # ...